<style>
    div { width: 0px; }
    span { text-decoration: underline; cursor: hand; }
</style>
<script>
function toggleFullScreen() {
    if (document.webkitIsFullScreen)
        document.webkitCancelFullScreen();
    else
        document.getElementsByTagName('div')[0].webkitRequestFullscreen();
}
</script>
<body>
    This tests that an element with a 0px width will not cause the window to disappear when entering full screen. <span onclick="toggleFullScreen()">Click to toggle full screen.</span>
    <div>
    </div>
</body>